present-value effect

基本解释

The present study was aimed at exploring the effect of integrative and instrumental motivation on second language proficiency by incorporating expectancy-value theory.
本项研究以融合期望价值理论为基础，探索了综合性动机和工具性动机对第二语言熟练性的影响，研究结果表明被试者工具性动机多于综合性动机。
The electric rice cooker designed according to the calculation of the present invention has obvious energy-saving effect and has large popularization and application value.
采用本发明计算设计出的电饭锅节能效果显著，具有较大的推广应用价值。
ip.com
This paper will understand the present situation and developing prospect of Traffic TV Station -a case study of Hangzhou, focusing on the analysis of audience, content, effect and industry value etc.
本文将以杭州的公交移动电视为例，从受众分析、传播内容分析、传播效果分析以及产业价值分析等几方面，对公交移动电视发展现状及其发展前景进行解读。